1051216644 has 48 divisors (see below), whose sum is σ = 2497340160. Its totient is φ = 344090880.

The previous prime is 1051216643. The next prime is 1051216651. The reversal of 1051216644 is 4466121501.

It is a super-2 number, since 2×1051216644² = 2210112865245245472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1051216643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206854 + ... + 211874.

It is an arithmetic number, because the mean of its divisors is an integer number (52027920).

Almost surely, 2^1051216644 is an apocalyptic number.

It is an amenable number.

1051216644 is an abundant number, since it is smaller than the sum of its proper divisors (1446123516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051216644 is a wasteful number, since it uses less digits than its factorization.

1051216644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340 (or 5338 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1051216644 is about 32422.4712815047. The cubic root of 1051216644 is about 1016.7887743449.

The spelling of 1051216644 in words is "one billion, fifty-one million, two hundred sixteen thousand, six hundred forty-four".